package com.xing.serviceedu.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.xing.servicebase.exceptionhandler.GuliException;
import com.xing.serviceedu.entity.EduSubject;
import com.xing.serviceedu.entity.excel.SubjectData;
import com.xing.serviceedu.service.EduSubjectService;
import lombok.SneakyThrows;

/**
 * 科目Excel监听器
 *
 * @author: xingfuhao
 * @create: 2022-01-26 19:26
 */
public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    //因为SubjectExcelListener不能交给Spring进行管理，
    // 需要自己new，不能注入其他对象
    //不能实现数据库操作

    public EduSubjectService subjectService;
    public SubjectExcelListener(){}

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    @SneakyThrows
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if(subjectData==null){
                throw new GuliException(20001,"文件数据为空");
        }
        //一行一行读取，每次读取有两个值，第一个值为一级分类，第二个值为二级分类
        //判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if(existOneSubject==null){
            //没有相同一级分类，可以进行添加
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }

        //获取一级分类的值
        String pid=existOneSubject.getId();
        //添加二级分类
        //判断二级分类是否重复
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if(existTwoSubject==null){
            //没有相同二级分类，可以进行添加
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId("0");
            existTwoSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existTwoSubject);
        }




    }

    /**
     * 判断一级分类不能重复添加
     * @param subjectService
     * @param name
     * @return
     */
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", "0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }

    /**
     * 判断二级分类不能重复添加
     * @param subjectService
     * @param name
     * @return
     */
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", "pid");
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
